#423C59
Closest named color: Dark Grey Blue (#29465B). oklch(37.5% 0.049 293.4), rgb(66, 60, 89).
Aa
White text reads best on this color (10.38:1).
About this color
#423C59 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.049 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.044 away. White text reads best on it, at 10.38:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.049) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.02:1 |
| White text | 10.38:1 |
Values
| HEX | #423C59 |
| RGB | rgb(66, 60, 89) |
| HSL | hsl(252, 19%, 29%) |
| OKLCH | oklch(37.5% 0.049 293.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #423C59 | 10.38:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #423C59 | 2.02:1 | Fails | Lc 9.8 | Not readable |
| #423C59 text on white | 10.38:1 | AAA | Lc 94.1 | Preferred for body text |
| #423C59 text on black | 2.02:1 | Fails | Lc -8.5 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#EAE9F1
oklch(93.7% 0.011 291.9)
-
Step 200
200
#D9D7E6
oklch(88.5% 0.021 292.1)
-
Step 300
300
#C1BDD7
oklch(81% 0.036 292.6)
-
Step 400
400
#A29AC3
oklch(70.7% 0.06 293.8)
-
Step 500
500
#8B81B4
oklch(63.1% 0.076 293.1)
-
Step 600
600
#756A9F
oklch(55.6% 0.082 293.1)
-
Step 700
700
#635888
oklch(49.1% 0.076 293.9)
-
Step 800
800
#50486F
oklch(42.6% 0.064 292.9)
-
Step 900
900 (this color)
#423C59
oklch(37.5% 0.049 293.4)
-
Step 950
950
#272434
oklch(27.1% 0.03 292.9)
#423C59 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #35405A | 0.023 |
| Deuteranopia (no green cones) | #353F58 | 0.022 |
| Tritanopia (no blue cones) | #3D4146 | 0.042 |
| Achromatopsia (no color) | #404040 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423C59
#423C59
oklch(37.5% 0.049 293.4)
- #414424
#414424
oklch(37.5% 0.05 113.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #423C59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.049
- Onyx #343A40 ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Dark Blue Grey #1F3B4D ΔE 0.057
- Prussian Blue #1D3557 ΔE 0.062
- Gunmetal #293241 ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.072
Use #423C59 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.